Imagine diving hundreds of metres into the depths on one breath. Now imagine using this ability to tag great white sharks in the least harmful way possible. William uses free-diving to help scientists tag different shark species around the world.
Managing sawshark populations requires good information on where they move and what their relative abundance. Jane and Paddy are using a variety of methods to improve our understanding of the conservation status and management of sawsharks threatened by fishing in south-eastern Australia.